Although the station's sources said Pierce, 23, and a male friend were "shaken" by the robbery, they weren’t injured. Pierce's stolen vehicle, a BMW, was later recovered. He played college football in Philadelphia at Temple.

Bernard Pierce finished the season with 532 rushing yards and a 4.9 average per carry. (AP Photo)

Agent Marty Magid told the Baltimore Sun that Pierce is doing "fine" and that police are continuing to investigate the incident.

The Ravens issued the following statement about the incident: "We have been in contact with Bernard and we are aware of the situation."

Pierce, a third-round pick in 2012, was a key complement to feature back Ray Rice during the Ravens' Super Bowl XLVII run. He finished the season with 532 rushing yards and a 4.9 average per carry.

Pierce should see his workload increased from his rookie season to help ease the wear on Rice in 2013.